[s-cars] Sticky Big Red

[Abe Berman]

Tom,

Thanks for the tips.  I did not closely inspect them, no, my mechanic
actually did the balancing as I do not have access to a balancer.

What constitutes an "exterior cleanup"?  I usually wipe down the caliper
exteriors and the surrounding with a rag and simple green when I change
winter and summer wheels.  I clean the rotors with brake cleaner should any
simple green get on them.  I do not however remove the caliper or rotor.  I
do inspect the lines and suspension components whilst down there.

Any recommendations on pads and fluid from the group?  As far as performance
needs, this is a spirited daily driver only, no track use.

Thanks,

a


On Mon, Jun 7, 2010 at 2:31 PM, Tom Green <trgreen at comcast.net> wrote:

>
>
>
> Did you have a chance to inspect the brakes while the wheels were being
> checked for
> balance?  You don't mention any intervening maintenance since the brakes
> were
> installed 5 yrs/30K miles ago.  It's certainly time for a fluid flush,
> exterior cleanup and
> inspection, and perhaps a pad change.  If they are one piece rotors,
> turning them to
> provide a new and true bedding surface for new pads is a good idea.  If the
> pads are
> worn 1/2 or more, the reposition of the piston may be all that is needed
> along with the
> new fluid, but if the pistons are out that far you might be advised to
> check behind the
> dust boot to make sure the pistons are clean and add a little plasti-lube
> to insure they
> retract smoothly when resetting for new pads.
>
> Then clean and inspect the brakes at least yearly and flush the fluid at
> least every two
> years.
>
>  Tom '95 S6
>          '95.5 S6 avant
> Knoxville, TN
>
>  -----Original Message-----
> Date: Mon, 7 Jun 2010 10:16:42 -0700
> From: Martin Kozaczek <mkozaczek at gmail.com>
> Subject: Re: [s-cars] Sticky Big Red
> To: Abe Berman <yellowcuda at gmail.com>
> Cc: s-car list <s-car-list at audifans.com>
>  Message-ID:
> <AANLkTilHqJpT3apSTxEfyJ0goZq8B9FwRMlw0kiQ_1Dp at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> I've read that some have had luck with taking the caliper off (easier to
> work this way) removing the seal or boot whatever it's called, then
> cleaning
> out the piston bore with liberal amounts o WD40 or equivalent, clearing out
> with compressed air and reassembling.
>
> My calipers were new so I didn't bother, just sent them back.
>
> On Mon, Jun 7, 2010 at 10:01 AM, Abe Berman <yellowcuda at gmail.com> wrote:
>
> Thanks for sharing Martin.
>
>
> Hmm, guess I should check the archives.  I am hoping (read: praying) that I
>
> don't need to replace the caliper(s).
>
>
> On Mon, Jun 7, 2010 at 12:40 PM, Martin Kozaczek <mkozaczek at gmail.com
> >wrote:
>
>
>  This seems to be a common problem with the older style two piece
>
>  928GTS/993 big reds or blacks.  I had a brand new set that did it right
> from
>
>  day 1.
>
>
>  I tried everything and could not get it to go away, so I returned them
> and
>
>  temporarily replaced them with 996 C4 calipers while I wait for my 996TT
> big
>
>  reds.  Problem went away immediately when I put the 996 calipers on.
>
>
>   On Mon, Jun 7, 2010 at 9:27 AM, Abe Berman <yellowcuda at gmail.com>wrote:
>
>
>  Patient - 95.5 Avant mit Porsche "Big Red" front calipers
>
>
>  Has anyone had problems with sticky Porsche calipers?
>
>
>  I have been experiencing incidences of shuddering on the highway and feel
>
>  it
>
>  slightly (but intermittently) around town at lower speeds.  Checked
>
>  balance
>
>  on all 4 wheels and its fine.  Tires are new and have no external
>
>  defects.
>
>
>  I experienced this to a HEAVY degree whilst on the highway on Friday and
>
>  immediately pulled off at an exit.  Front Left wheel had serious heat
>
>  radiating off of it and a strong brake smell, all others were normal.
>
>
>  I did some reading and it seems like the correct procedure would be to
>
>  clean
>
>  and lubricate slide pins and flush brake fluid/bleed brakes to eliminate
>
>  possible gunk/moisture in lines.
>
>
>  The Big Reds were installed approximately 5 years/30k miles ago.
>
>
>  Thanks in advance for any thoughts.
>
>
>  Abe
>
>  Burlington, VT
>
>
>